fix(medusa): Discount allocation precision issues (#3244)

integration-tests/api/__tests__/admin/order-edit/order-edit.js

@@ -2569,15 +2569,13 @@ describe("/admin/order-edits", () => {
               ]),
             }),
           ]),
-          // rounding issue since we are allocating 1/3 of the discount to one item and 2/3 to the other item where both cost 10
-          // resulting in adjustment amounts like: 1333...
-          discount_total: 2001,
-          total: 1099,
+          discount_total: 2000,
           gift_card_total: 0,
           gift_card_tax_total: 0,
           shipping_total: 0,
           subtotal: 3000,
           tax_total: 100,
+          total: 1100,
         })
       )